Leader of of the armed forces of the Moon. Gym is a forceful, swaggering man who carries a katana as an affectation. He believes that humanity can only live up to its true potential during times of war, and seeks to use the Turn X to sow conflict and re-kindle the brutal conflicts that plagued the Dark History.

Both Agrippa Maintainer and Guin Sard Lineford think that they can use Gym to their own ends, but they fail to understand his lust for battle. Neither politician is able to control him.

(Source: wiki)